/Engine/Source/Runtime/GeometryFramework/Public/Components/DynamicMeshComponent.h
The bDeferCollisionUpdates property is a serialized Component setting that controls when collision is regenerated. However, in some cases where aUDynamicMeshis being programmatically edited (eg like a live deformation/etc), we want to defer collision updates during the user interaction, but not change the serialized property. In this case a non-serialized version of the flag can betemporarilyset via this function in C++.
void SetTransientDeferCollisionUpdates ( bool bEnabled )